package day1;

/**
 * @author oldliu
 * @since 1.0
 */
public class SystemTest {
    public static void main(String[] args) {
        System.out.println(System.getenv());
        //时间
        long time=System.currentTimeMillis();
        System.out.println("time:"+time);
        System.out.println("hello");
        System.exit(0);
        System.out.println("world");
    }
}
